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An atmospheric Internal Boundary Layer (IBL) occurs when sudden changes in surface roughness disturb\udwind flows. The region of the Brazilian Alcantara Space Center (ASC), with its rocket launching pad located 150 m\uddownwind of a 40 m coastal cliff, presents the formation of an IBL due to winds blowing inland from the ocean. Numerical\udsimulations using the immersed boundary method, experiments in a wind tunnel using particle image velocimetry, and field\udobservational data obtained from anemometric towers were used to study this IBL. The results demonstrated that it is\uddependent on the geometry of the coastal cliff: its height is around 17 and 15 m for slopes of the coastal cliff of 90º and\ud135º, respectively. The numerical results show a good agreement with the experimental data and the field observations, but\udwith an overestimation of the vorticity field. The IBL significantly influences the wind flow at the launching pad.CNPq (141861/2006-1) (Grants 559949/2010-3 and 303730/2010-7)CAPES (13870-12-2)FAPESP (process 04/16064-9

A Study of the Internal Boundary Layer Generated at the Alcantara Space Center